To obtain high performance WFS, parallelize querying of large GML document is one of the feasible ways.

并行查询大规模GML文档是一种行之有效的获得高性能WFS的方法。

Structured Query Language (SQL), in computer science, is a database sublanguage used in querying, updating, and managing relational databases.

在计算机科学中，SQL语（结构化查询语）是一种用于查询、更新和管理关系数据库的数据库子语。